Boiler



l930- H. WhATTEN 1,785,756

BOILER Filed May 28', 1928 INVENTOR.

Patented Dec. 23, 1930 "mm STATES HENRY L. WBATTEN, 0F RAGINE, WISCONSINBOILER- Appllcation filed Kay 28, 1928. Serial No. 281,177.

This invention relates to improvements in boilers.

It is-one of the objects of this invention to provide an improved boilerin which the hot gases of combustion are utilized to heat a fluid withinthe boiler in a very eflicient and economical manner.

It is a further object of this invention to provide an improved boilerin which the hot gases of combustion are directed through and around thefluid in a circuitous route so that there is a maximum extraction ofheat from said gases and a minimum of waste through the chimney.

It is a further object of this invention to provide an improved boilerin which the chimney flue is formed with a U-shaped extensionsurrounding the outside of the boiler and connecting with a chamberbelow, the gases of combustion being discharged from said chamber intothe flue extension and pass- -same parts in all of the views:

Fig. 1 is a longitudinal section of the improved boiler; 1 Fig, 2 is across section taken on the line 2-2 of Fig. 1; and I I Fig. 3 is a frontend view, parts being broken away.

Referring to the drawing, the numeral 5 designates the boiler generallywhich has extending within it, at one end, a combustion chamber 6. Gratemembers 7 support the fuel, and an ash chamber 8 having a door 9 ispositioned'bclow said grate. The combustion chamber is formed with afuel opening 10 which connects with an opening 11 in the front end ofthe boiler. The opening 11 is normally closed by a door 12. Spacer rods4 extend between the walls'of the boiler and the walls of the combustionchamber. v At the other end of the boiler is a chamber 13 separated fromthe rest ofthe boiler by a partition 14. Tubular members 15, extendingthrough the boiler from the combustion chamber to the chamber 13,conduct the combustion gases to the latter chamber. Rods 14 extendhorizontally between the' front end of the boiler and the partition 14,and also between the side walls of the boiler. At anintermediate pointin the lower portion of the boiler is a chamber 16, which is separatedfrom the boiler proper by walls 17. The latter chamber-is connected withthe end chamber 13 b a plurality of tubular members 18. The chamber 16is provided with a clean-out opening 19 which is normally closed byeacover 20. One of the novel features of the invention resides in theemployment of a chimne flue extension 21- forming a U-shaped disc urgepassageway 21' which extends around t e boiler proper connecting at eachside 22 with the lower chamber 16, The top of the passageway 21 isformed with an opening 23 to which the chimney flue 24 is connected.Clean-out openings 25 are provided in the upper portion of thepassageway.

The operation of the boiler is as follows: The hot gases formed withinthe combustion chamber 6 are drawn throughthe tubular members 15 heatingthe water in the boiler which surrounds said members. From the tubularmembers 15 the gases of combustion pass into the end chamber 13 and arethen drawn into the tubular members 18. In passing .throughthe latter,the water in the lower Cal portion of the boiler is heated. From thetubular members 18 the gases enter the chamber 16, and then pass to thechimney flue 24 by travelling through the discharge passageway 21' onboth sides of the boiler. The novel construction of the passageways andfines accomplishes thorough heating of the water in both the upper andlower portions of the boiler, and also additional heatin as the gasesass around the boiler to the c imney flue. he invention thereforprovides a means for extracting a maximum amount of heat from the gasesof combustion and thus renders the improved boiler both efiicient andeconmical.

What I claim is: g V. p

1. A boiler comprising an outer casing, a

combustion chamber within one end of said casing, a chamber at the otherend of the easmg, a tubular member. connectin bustion chamber with theend cham er and exsaid other chamber and extending through the'boilerfor conveying gases of combustion therethrough, an intermediatelypositioned chamber, a tubular member connecting the the con'itendingthrough the boiler for conveying gasesof combustion therethrough,anintermediately positioned chamber in a lower portion of the boiler, atubular member connect-v ing, the end chamber with the intermediatechamber and extending through the boiler, anda discharge passagewaysurrounding a portionof the boiler and connecting with both sides of theintermeditechamber.

2. A boiler comprising an outer casing, a combustion chamber within oneend of said casing, a chamber at the other end of the easing, a tubularmember connecting the combustion chamber with the end chamber andextending through the boiler for conveying gases of combustiontherethrough, an intermediately positioned chamber in a lower por-'tionof the boiler, a tubular member connecting the end chamber with theintermediate chamberand extending through the boiler, and a U-shapeddischarge passageway surrounding a'port ion. of the boiler andconnectingwith both sides of the intermediate chamher. 1

3. A, boiler comprising anouter casing, a combustion chamber extendingInto SBJdCfiS- ing at one end, a chamber at the other end of the'casing,a plurality of tubular members connecting the combustion chamber withthe end chamber and extending throughthe boiler for conveying gases ofcombustion therethrough, an intermediately positioned chambeer in thelower portion of the boiler, a 1ur-' ality of tubular members connectingthe end chamber with the intermediate chamber and extending through theboiler, and an exten sion U-shaped in cross section, surrounding aportion of the boiler to form a discharge passageway around said boiler,the lower ends of said extension merging into opposite sides of theintermediately'positioned lower chamber.

4. A boiler comprising an outer casing, a combustion chamber within saidcasing, another chamber in said casing, a tubular member connecting thecombustion chamber With

